When a researcher is confident that results can be attributed to a treatment's influence and nothing else, it is said that the study is ____ valid.
A) externally
B) empirically
C) intrinsically
D) internally
E) statistically

Question

Quizplus · Accepted Answer

Internal validity refers to the extent to which a study establishes a cause-and-effect relationship between the treatment and the outcome, and eliminates alternative explanations for the results. It pertains to the validity of the study's design and methodology, and whether they adequately control for potential confounding variables or biases. In contrast, external validity refers to the generalizability of the study's findings to other populations, settings, or conditions. Empirical validity is not a commonly used term in research methodology, and intrinsic validity does not have a clear definition in this context. Statistical validity relates to the accuracy and precision of the results, and whether they are statistically significant and reliable.

When a Researcher Is Confident That Results Can Be Attributed